I've done it fairly often, both with a samsung moment and the htc evo. Occasionally the phone and the car don't want to connect immediately. It seems like there are times when it takes a moment or two for the computer in the car to boot up, during which time the bluetooth is unable to connect. Have you tried waiting a minute or two, before unpairing and re-pairing?
		
		
	 
 
No, but good point, I will try that today. Thanks!  

 I guess I get impatient, wanting the music to start when the car starts. LOL
 
	
		
	
	
		
		
			for the most part I have always just turned on bt...and the car and phone pair, then I start pandora. 
 
bt has to be switched on 
the two make a connection
turn on pandora 
---sometimes I get a bad/choppy connection here, does this on pandora or slacker..changing channels fixes it. 
 
the way mine is set up...if the head unit is on and in my case (and this may be the difference) if the head unit is in bluetooth mode, and bluetooth is on on the phone then pandora auto makes a connection when I turn it on. 
 
After typing this I think the difference is these factory head units. mine is aftermarket. While in any other mode ie fm, dvd, etc...phone audio bluetooth works when a call comes in. In order to listen to music streaming via bluetooth from my phone I have to manually switch the source on the head unit to the bluetooth aux mode. I don't know that the factory head units have this aux option.
		
		
	 
 
Yes, I have to manually select BT in my car's factory headunit, which I have done.  And for the last few days, I have left the car's audio in this BT mode.  It works great after I: (from the phone) unpair, re-pair and then it connects...  I will try giving it a minute or two.  Last night, while out, I did this procedure, and before I started Pandora, the stock player came on and started playing by itself, thru the headunit.  

  Took me a few minutes to realize it wasn't Pandora that was playing!  LOL That was strange. It just played the default songes that came with the EVO, as I have never added any music to it.    
 
	
		
	
	
		
		
			Occasionally my head unit and phone won't connect, all I do is go into bluetooth setup on the head unit menu and manually connect.
		
		
	 
 
When I get in the car, the phones BT is already on, the car is set to BT and the cars display has a button to press that says "connect"  indicating it wants to connect to the media player's BT.  Pressing this connect button, starts the searching, but it never connects, unless i take action on the phone, as mentioned above.  
 
But I will try giving it a few minutes.
 
Thanks all for the suggestions. 

  I will keep trying and let you know how it goes.