Register RegAsm .NET libraries

Hello,
I'm new here, but i have a problem. I need to register a DLL with RegAsm.exe (.NET 2.0) i try this:

ExecWait '"$WINDIR\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe" /tlb /codebase "$INSTDIR\dlls\mydll.dll""' 

But doesn't work, how i can to do this?

Thanks for help.

What's with the double quotes at the end?

Stu