Upload stopped working; DFP won't activate

I've had DFP file upload working on my website for over three years and now it has stopped working. The progress wheel now just spins and spins.

I then went to DW4 to create a test upload page but ran into problems there. When selecting File manipulation -> Upload, I get the following DW error:

While executing onLoad in WA_DFP_FileUpload.htm, the following JavaScript error(s) occurred:

At line 95 of file "C:\Program Files\Adobe Dreamweaver CS4\Configuration\Commands\WA_DFP_FileUpload.js":doSerialCheck is not defined

So bottom line on this is that the function is no longer working on my site and the extension is not working in DW4.

I think if you reinstall the extension it will work in DW4. It looks like you may have an older version installed.

If you send a link to the page that won't work I could take a look and see if I could spot the issue.

As far a reinstalling the extension, I have the Universal Email extension which as you know is old and recently installed eCart. Will reinstalling the UE extension mess up files for the eCart extension?

Universal Email is included in eCart. So remove it and reinstall eCart without installing Universal Email and you should be good.