Hi guys, many thanks for your excellent support but it seams I am not able find the solution. Using the most current build 956 but still getting error - the message is:
R] Connecting to
www.oskarinteractive.cz via Proxy -> IP=ecpraha PORT=21
[R] Connected to
www.oskarinteractive.cz via Proxy
[R] 220 ecpraha Microsoft FTP Service (Version 5.0).
[R] 500 'CONNECT
www.oskarinteractive.cz:21 HTTP/1.0': command not understood
I expect the problem is really somewhere on the the Microsoft (ISA server side). But I am not savvy enought in technology to be able to resolve this problem and try to search on Microsoft site for "TLS"...