Why your question is quite simple, you don't.
Since you have the X51V (nice purchase by the way), you have WM5 on your Axim. There are significant imporvements mainly in the way it stores files, but unfourtnatley, Microsoft went back to it's own bluetooth stack, thereby doing in the ability to do much of anything with bluetooth. You can still use DUN, and sometimes OBEX, and even SPP. Still others say there is a rumor that Microsoft and Dell might be releasing an update later this year or ealry next (like before Jan. 15) that is supposed to fix all this.
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"If the automobile had followed the same development cycle as the computer, a Rolls-Royce would today cost $100, get one million miles to the gallon, and explode once a year, killing everyone inside." Robert X Cringely
Addition who needs that kind of stuff any way huh?
Who cares if I'm only 16?