visual studio asp.net project requiring password if started over rdp

If I connect to my development machine via RDP and work with an asp.net solution, I have to enter my username and password for opening the projects web site (from within the rdp session). If I do the same localy on the development machine, no password is required.

The only solution to avoid this strange behaviour, is to deactivate NTLM-authentication in the project start options.

What is the reason for this strange behaviour? W开发者_Python百科hat is the difference when I use VS2010 in remote session instead of a local session?