Export to Excel wont work in older Mendixversion ?

I have a problem when running an Excel export in mycustomer environment. We are running a application with export to excel functionality. It works finewhen deployed from the modeler, but when put on the production serverit wont produce any results. I first considered this a localizedproblem, possibily with IE (8 & 9), but now have established that a cloud hosted applciation DOES export. Additionaly I also wrangeled the KA-crew to install Chrome en FF, and neither will export, so right now mybest guess is this is version/environment related. Suggestions ?
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