Error when checking for application updates

I am behind a proxy and in options I have the Automatic proxy configuration option.
When I check for updates I get the following error:

Received response 407 Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. ) from ...

I tried with manual config, but it doesn't help.
Other applications also have the "auto proxy" setting and there are no such problems with them (they manage to authenticate with the proxy successfully).

I have had this with all WinSCP versions but currently:
Windows 7, 32 bit
WinSCP 5.1.4 (build 3020)

Thanks for your report.
I have sent you an email with a debug version of WinSCP.

The log I sent you was for the case that WinSCP crashes. So I did not even manage to try the UPDATE when producing it.
Will it still be enough for you?

Mail with logs - sent.

Still occurs in 5.2.1

Could this problem be because the proxy requires username/password?
WinSCP does not have fields to enter username and password.

braykov wrote:

Could this problem be because the proxy requires username/password?
WinSCP does not have fields to enter username and password.

Can be, WinSCP does not support that.

How about "Use IE settings" for proxy ?

braykov wrote:

How about "Use IE settings" for proxy ?

It does not change the fact that WinSCP does not support authentication for proxy.

OK, I see.
10x