[...there was no endpoint listening at]

it's the second machine with pc monitor. the first - windows 2008 r2 - works fine. the prob-machine windows 7 x86. firewall is out.

on validating account or changing account details, manage registered computers, i become a error message: "there was no endpoint listening at https://ws15.mobilecomputer.com/server.svc that could accept the message. this is often caused by an incorrect address or SOAP action. see innerexeption, if present, for more details."

[...there was no endpoint listening at]

https://ws15.mobilep....com/server.svc - Login crashed.

Whats wrong?