Better yet, here it took me 30 seconds to find a link on telus' website which took me to their download section on blackberry.com
https://www.blackberry.com/SoftwareD...ient=dB5bZddMq
Install the handheld software 3.7 for 7750 on your PC
then run your handheld through application load and update the software if it asks to, after its all matched up then try installing eOffice