phpBB issues, installed *After* zencart

HI all,

I'm running ZC 1.3.7 and have just installed a fresh release of phpBB in a subdomain of the same domain hosting ZC.

I've made changes to the configure.php file, accurately stating the path

 define('DIR_WS_PHPBB', '/var/www/forum/');
```As the forum is in a subdomain (forum.xxxxx.xxx), I followed Dr. Byte's advice to hard code the path: 
<http://www.zen-cart.com/forum/showthread.php?p=300988#post300988> 
I've set, using the admin panel, 'enable phpBB linkage' to 'true'.

Result:
I get a forum link on my sidebox, where I expect it to be.  The link is functional and takes me to the forum.  So far, so good.

Problems start when creating a new account in ZC.  
1) no 'nickname' box on signup
2) no login created on the phpBB database (different than ZC database)

I've read the myriad threads on phpBB linkage, but can't seem to find an answer to this.  Any help would be greatly appreciated.

TIA,
~Ray
BouncerFL