Problem with multiple application instances

I'm using SkinFramework to modify my application look. I'm using Office2007.cjstyles succesfully.
The problem appears when I try to run a second instance of my application: It crash.
The message I get is:

Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call.  This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.

The module is identified as: ToolkitPro1321vc90d.dll

The debuger is stopped in the return of "DWORD WINAPI CXTPSkinManagerApiHook::ThreadProcHook(LPVOID lpThreadData)".
The lines of code I'm using in my application are:

    XTPSkinManager()->SetApplyOptions(xtpSkinApplyFrame | xtpSkinApplyColors | xtpSkinApplyMetrics | xtpSkinApplyMenus);
    XTPSkinManager()->LoadSkin("Office2007.cjstyles");

I'm calling this functions from the CMainFrame constructor, but I have change the calls to the Initinstance proc, and the same happens.

Any help?

yes, I have solve the problem using:
XTPSkinManager()->SetAutoApplyNewThreads(FALSE);