Cannot upload attachments

Suddenly I cannot upload an attachment. I have deleted some of the earlier attachments to reduce the number but this has made no difference, The little moving circle just keeps going and going indicating that the file is uploading but it never completes. The file is a PNG of 51Kb size. Much the same as many others I have uploaded.
Any ideas please?

Mmm...I had that a few times today, and then that spinning circle went away and it was all good.

Well I have tried all the suggestions here. logged out, rebooted, logged in. Tried different file types but still cant upload attachments.
Any other ideas please?

One stupid idea..
Did you try with another browser? Or deleting cookies?
Mine is working fine

StalkeR said:

One stupid idea..
Did you try with another browser? Or deleting cookies?
Mine is working fine

Tried Firefox, Chrome and IE8. No good, yes I did delete cookies at the beginning

P.S. Thanks for trying, certainly wasn't a stupid idea!

z3r010 said:

Try clearing all the site cookies with this link - vBulletin > My Cookies

Just tried that. Should it leave me with a blank page? Or should the Cookie titles still be listed?
\odd thing is, when I click the upload button, there is a box at the bottom of the windows that jumps immediately to 87% loading and just hangs there!

Just tried to upload an attachment using my XP machine just to see I that were possible. But no go. Seems to be my login to the Forum!