Microsoft beta client cannot send report

[Petr]

I'v noticed the following problem.

After completeing the report, the File Transfer Manager (FTM) tries to send it to Microsoft, but it fails with error message

Incorrect handle state was reported by network. Error Code = 12019

Unfortunately I was not able to find any explanation what this could mean.

Maybe some problem with proxy? I use squid 2.4.STABLE6.

Petr