i've been scouring the search and haven't found anything that resolves my inability to use DUN on my treo 750 with a macbook running OS 10.4

Here's what i've done so far.

1. paired the phone with my macbook
2. enabled the phone to be used as a modem
3. installed the windows mobile script that i found in another thread
4. tried connected to the phone using hte bluetooth networking option
5.my settings for the l/p are, WAP@CINGULARGPRS.COM / CINGULAR1. phone number is *99#

whenever i try and connect, i get an error on mac that says there was no carrier.

or a msg on the treo that says answering modem has disconnected.

any help or ideas?