winscp424 bug

Hi. I'm using winscp424 beta and have the folowing bug(See below, I just CTRL+C Error Window), when I try to copy file to server via FTP.
I connect throw sock5 proxy server and remote FTP server uses passive mode. Thanks.

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winscp424.exe
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Assertion failed: xdrPtr && xdrPtr == *xdrLPP, file xx.cpp, line 2233
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ОК
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Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.