Banner is not editable

Hi.
I have some banners in my ACP. But I have one that I cannot edit after I added it. I deleted it and added it again and had the same problem. Any other banner does work even on the same position.
The Banner is a scripted one from a partner program. But I have another one (smaller on another position) and this I can edit.
Any ideas?
Greetings
Thorsten
I have some banners in my ACP. But I have one that I cannot edit after I added it. I deleted it and added it again and had the same problem. Any other banner does work even on the same position.
The Banner is a scripted one from a partner program. But I have another one (smaller on another position) and this I can edit.
Any ideas?
Greetings
Thorsten