Partyfinder errors >.<

Neuz error LNK2019: unresolved external symbol "public: void __thiscall CWndPartyFinder::RefreshItemList(void)" (?RefreshItemList@CWndPartyFinder@@QAEXXZ) referenced in function "public: void __thiscall CDPClient::OnRefreshPartyList(class CAr &)" (?OnRefreshPartyList@CDPClient@@QAEXAAVCAr@@@Z)

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Neuz error LNK2019: unresolved external symbol "public: __thiscall CWndPartyFinder::CWndPartyFinder(void)" (??0CWndPartyFinder@@QAE@XZ) referenced in function "class CWndBase * __cdecl AppMain_PartyFinder(void)" (?AppMain_PartyFinder@@YAPAVCWndBase@@XZ)