Reply to vci-100se Sync function will not sync tracks HELP!

i just got my new vci 100se and i mapped everything correctly. everything except the sync function is working properly. When two tracks are playing i try to sync the track i am mixing in to the master track that is playing. The sync button is not active on the master track so i know this is not causing my problem. When i push the sync button it changes the bpm to the matching bpm but it does not sync the beat. If i manually beat match the beats then push sync it actually makes the tracks un-synced. i have tried everything. i have remapped the sync button. changed it from toggle to hold and back again. i even reinstalled traktor and re loaded the mappings numerous times. i do not know what is wrong possibly my vci is just broken? please help.