fmswpc.exe is using 100% of processor

[Clinton]

I have FileMaker Server 9 running on a Windows 2003 Server machine. The application is accessed completely through php/html pages using the FileMaker API for PHP.

I recently began getting complaints that it was running so slowly, it was unusable. Looking into it, i've noticed that the process fmswpc.exe is using between 90 and 100% of my server's CPU. Has anyone else had this problem?

Even if i have only one user sending requests, that process will still hit around 70%. What is this process? what causes it to eat so many resources? Is there anything I can do?