Looks like you did not install the metamod.
Code:
gamedll "dlls\hl.dll"
gamedll_linux "dlls/hl.so"
gamedll_osx "dlls/hl.dylib"
Code:
gamedll "addons\metamod\dlls\metamod.dll"
gamedll_linux "addons/metamod/dlls/metamod.so"
gamedll_osx "addons/metamod/dlls/metamod.dylib"
Make sure that metamod it's uploaded in cstrike/addons folder.