LNK2005 Static library

[TheGrimace]

I am trying to include a 3rd party Qt made static library in my Qt project thread. Whenever I instantiate an instance of the class, however, I get the following linker error:

Error 1 error LNK2005: "public: __thiscall QString::QString(char const *)" (??0QString@@QAE@PBD@Z) already defined in QtCored4.lib(QtCored4.dll) c:\Source\QT4_Core\PMD Monitor\PmdClientApi.lib 1

And about a hundred more just like that. All having to do with QString.