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I am a new user and not a lot of Minecraft but still perfectly video tutorials and I get a crash .
This is the error:

---- Minecraft Crash Report ----
// But it works on my machine.

Time: 07/09/15 01:28
Description: Initializing game

net.minecraft.client.renderer.StitcherException: Unable to fit: minecraft:blocks/lava_flow - size: 32x32 - Maybe try a lowerresolution resourcepack?
at net.minecraft.client.renderer.texture.Stitcher.func_94305_f(SourceFile:60)
at net.minecraft.client.renderer.texture.TextureMap.func_110571_b(TextureMap.java:252)
at net.minecraft.client.renderer.texture.TextureMap.func_174943_a(TextureMap.java:83)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:98)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:29)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:130)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:474)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.client.renderer.texture.Stitcher.func_94305_f(SourceFile:60)
at net.minecraft.client.renderer.texture.TextureMap.func_110571_b(TextureMap.java:252)
at net.minecraft.client.renderer.texture.TextureMap.func_174943_a(TextureMap.java:83)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:98)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:29)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:130)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:474)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows XP (x86) version 5.1
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 135815320 bytes (129 MB) / 279359488 bytes (266 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1450 3 mods loaded, 3 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1450.jar)
UCH Forge{11.14.3.1450} [Minecraft Forge] (forge-1.8-11.14.3.1450.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '1.4.0 - Build 7.14.10.4764' Renderer: 'Intel 945G'
Launched Version: 1.8-Forge11.14.3.1450
LWJGL: 2.9.1
OpenGL: Intel 945G GL version 1.4.0 - Build 7.14.10.4764, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Not using framebuffer objects because OpenGL 1.4 is not supported, EXT_blend_func_separate is supported, OpenGL 3.0 is not supported, ARB_framebuffer_object is not supported, and EXT_framebuffer_object is not supported.
Shaders are not available because OpenGL 2.1 is not supported, ARB_shader_objects is not supported, ARB_vertex_shader is not supported, and ARB_fragment_shader is not supported.
VBOs are available because ARB_vertex_buffer_object is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: Español (Argentina)
Profiler Position: N/A (disabled)


Please appreciate if someone could help me in terms that I can understand.
Thanks.