It still don't seem to be doing much other than a couple little bubbles in there. Would it help to add another packet in another day or two. Or just split it and put a packet in each?
A few things may keep a yeast from getting going, you may want to check these out:
First, check with your hydrometer to see if there has been any change in the SG, so you really know whether or not your yeast is working.
Make sure your yeast was not old / dead yeast and was properly pitched into your must.
Check to make sure that your SG is not too high to prevent the yeast from getting started.
Make sure your must is within the recommended temps for your yeast, usually in the upper 60's or low to mid 70's.
Make sure that your pH is within the recommended range for your yeast, normally above 3.0, but 3.2 or higher is better.
If it all checks out, and more than 3 or 4 days has passed, try pitching another packet of yeast.