Problem with mailaddress windows7 64 bit PC

[steve]

Using the following pb 11.5 script to bring up the global address
list:

mRet = mSes.mailAddress(mMsg)
if mRet <> mailReturnSuccess! then
MessageBox("Mail", 'Addressing failed.')
RETURN -1
END IF

Works fine on 32 bit XP PC's, but on my Win7 64 bit PC, the address
box is displayed, I am able to choose a name from either global
address list or contacts and click ok, but always get
mailreturnfailure! error code in
my development environment.

Also using Office 2007 if that is relevant.
I'm not sure if the problem is Office 2007, Win7, or the 64 bit opsys.
Anyone else experiencing this dilemma??
Does anyone have this working with any of the 3?