How to enter "pause" character in contact phone#?

[taa1]

I'm attempting to set up a contract entry to automatically dial my home voice mailbox, put in my mailbox number, do the "#" etc., but I need to be able to do a pause in the dialing sequence. Here's what I've tried:

xxx-xxx-xxxx,1,#,yyyyyyyyyy#,zzzzzz#

Where x's are for the mailbox service phone#, y's are my home phone# and z's are the pin#. The G1 put in the dashes for me.

When I touch the contact to have it dial, I see:

USSD code running....

"Connection problem or invalid MMI code."