"MD5 sum of uploaded file does not match existing file in archive" but I have no file in my archive!

[adnarim <adnarim@xxxxxxxxx>]

Hi,
I packed an application and uploaded it. Because I did some improvments on the package I deleted the old one on my PPA and wanted to upload the new one. But now the package is always rejected with this message:

Rejected:
MD5 sum of uploaded file does not match existing file in archive
Files specified in DSC are broken or missing, skipping package unpack verification.

I checked the md5 sums in my new package and they are correct with the changes file. So is there something left in the PPA of the old package and is this compaired with the new package? How can I avoid this? Do I really have to use a new version number to make it work?

Here's the url to my ppa: http://ppa.launchpad.net/adnarim/ubuntu/
And although the file is deleted from the ppa-webfrontend it appears in the url above. Can I not really delete it?

Any answer would be really nice :)

greets