@kongondo thank you so much for your patience... ;-) Will give that a shot..
Thanks peeps, you have been very helpful.
I’ve just hit this problem when installing a fresh version of Evolution 1.0.3 on IIS6 with PHP 5.2.6.
Perhaps it’s just an issue with our server but I had to install 1.0.2 and then upgrade to 1.0.3.