Assertion failed, someone help :/

[UPI2k5]

Hi guys, got this error today on my ioFTPD when i woke up
version is 5.8.5r and has worked perfectly, until now

Running XP PRO SP2

Got this error message from ioFTPD, when i try connect my home ftp
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Assertion failed: m_szAppName==NULL, file .\minidumper\mdump.cpp, line 13
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
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Hopefully someone knows whats the problem and how to fix it