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So I downloaded the cell shaders mod, I have followed the correct steps as shown in the video, everything is fine until I load my game, it then says "Shutting down internal server." I then get this crash report

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 6/15/13 12:37 PM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: net.minecraft.server.management.PlayerInstance.<init>(Lnet/minecraft/server/management/PlayerManager;IIZ)V
at net.minecraft.server.management.PlayerManager.getOrCreateChunkWatcher(PlayerManager.java:167)
at net.minecraft.server.management.PlayerManager.func_72690_a(PlayerManager.java:157)
at net.minecraft.server.management.PlayerManager.func_72683_a(PlayerManager.java:206)
at net.minecraft.server.management.ServerConfigurationManager.func_72375_a(ServerConfigurationManager.java:214)
at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:262)
at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:130)
at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:97)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:675)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:571)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:127)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)


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

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 316138880 bytes (301 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 2520 (141120 bytes; 0 MB) allocated, 2508 (140448 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
FML: MCP v7.51 FML v5.2.2.684 Minecraft Forge 7.8.0.684 Optifine OptiFine_1.5.2_HD_U_D3 3 mods loaded, 3 mods active
mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{5.2.2.684} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{7.8.0.684} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 813 (45528 bytes; 0 MB) allocated, 801 (44856 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['Biohazard122'/314, l='Survival', x=259.84, y=64.00, z=289.30]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'
------------------------------------

Help would really be nice! If anyone knows the solution please reply!