A downloading file sticks with very little to go for a long time, is there a reason for this?

There may be yes! The program you need is Donkey Doctor. If you speak only english then you will also need to get a language file for Donkey Doctor. Once you find and install the program set the edonkey path to the eMule folder (it says eDonkey because the program was originally written for eDonkey2000), then set the incoming and temp folders (and language file if required.

After this go to eMule and click the File in the list and right click and click Show File Details, find out the number of the part file and close eMule. Then click Test Met in Donkey Doctor and select the number u just got from the filedetails in eMule. Sometimes Donkey Doctor will find parts that are corrupted and will knock off a few MB's of the download but at least it can then finish OR sometimes (actually a lot!) it will tell you parts are marked as incomplete but are complete and then may complete the file and transfer it to your incoming folder.