Has your desktop wallet fully synced ?
By the way i will be transferring my coins in web wallet later tonight and will let you know if it is successful or not.
Yes is fully synced, Is almost 3 hours now, maybe is a normal time of waiting I don't know.
Which version of wallet are you using? Is that any of 1.0.x? There is a new version released 1.2.1 and the previous version aren't anymore supported. I think that may be the issue.