Ad-Hoc connection problem

[leev]

Hi,

I've got a problem setting up an ad-hoc connection...
after choosing Name/webkey/etc I press next, and it tells me something like "Impossible to configure the connection.."

I already had this problem month and month ago, but I solved it (I don't remember how!)
Maybe it's a problem of services...but I don't know WHICH services, maybe not...

any ideas?

thanks!