Converting a program from Excel 2003 to Excel Mac 2011

Hi

I have a great program that I used for calculating the sum total of various part prices into a assembly
It was originally written under windows using Excel 2003, it uses various spreadsheets and macro's to do the
calculations and update information. I recently copied it over to a new directory and tried running using Mac Excel
2011. Seems to be a issue with the path name, adjusted everything i can think of, but now starting to realize it may
be a XLS vs XLSM issue. Does anybody have any first hand experience with such as issue

Cheers

Created a spreadsheet two days ago on a windows box using 2007. Just got office for my mac at home and was able to open a .xlsm file without any issues. Did you Find/Replace all of your old links? Maybe you missed one? That is the only thing I can think of..the only issue I had was the graphics on my userforms were deleted and the data sources for my comboboxes were broken..