[TYPO3] Parameter Error

[Ron]

Hi

My hosting service moved to a new server.  Now when I click to expand a 
thumbnail image I get: "Parameter Error: No file given."  Everything 
else seems to work. This is a fresh Typo3 install. Initially my host did 
not have ImageMagick installed. They installed it yesterday and I ran 
the install tool, cleared the cache and so on. Does anyone know what I 
should be looking in to?

Regards
Ron