Edit: i did download from the OP...
The error message reads:
"Forge Mod Loader has found a problem with your minecraft installation
The mods and versions listed below could not be found
The file 'Forgemodloader-client-0-log' contains more information."
the forgemodloader-client-0.log is a .lck and i don't know what program to use to open it.
there is also a forgemodloader-client-0 but its a txt doc.
and the only line i found about Thaumcraft was:
2012-12-03 15:11:25 [FINE] [ForgeModLoader] Thaumcraft(Thaumcraft:3.0.0f): Thaumcraft3.0.0f.zip (required-after:Forge@[188.8.131.527,);after:BuildCraft|Core;after:BuildCraft|Energy;after:Forestry;after:IC2)
I thought Forge was on 184.108.40.2067. but that's all i got of the message.
and Forge works without Thaumcraft3.0.0f in the mods folder
Requires 407 or later.