newbie needs help with virtual hosting
 

Apologies in advance if this is the wrong forum.
Anyone know of any issues where Apache doesn't handle .biz domains? I'm trying to configure virtual hosting for 3 of my domains on a RH 7.3 server I'm hosting and I can't seem to get it to direct to the default page for the .biz domain. It continues to display the default page of domain1. domain 2 & domain3, which is are .com domains, are fine and will display the index page I've added to their directories. So if I type in www.nubiint.com I get the default page for my pn site.
www.newundertakings.com also gives the test default page.
www.nusolutions.biz gives the default page for www.nubiint.com.
My virtual host section looks like this:
#-------------------------------------------------------------
# Domain 1 for this server - nubiint.com
#-------------------------------------------------------------
<VirtualHost 192.168.1.11:80>
ServerAdmin me@mydomain.com
ServerName nubiint.com
ServerAlias www.nubiint.com
DocumentRoot /wwwroot/htdocs/nubiint
LogLevel info
ErrorLog logs/www.nubiint.com-error_log
CustomLog logs/www.nubiint.com-access_log common
</VirtualHost>
#-------------------------------------------------------------
# Domain 2 for this server - newundertakings.com
#-------------------------------------------------------------
<VirtualHost 192.168.1.11:80>
ServerAdmin me@mydomain.com
ServerName newundertakings.com
ServerAlias www.newundertakings.com
DocumentRoot /wwwroot/htdocs/newundertakings
LogLevel info
ErrorLog logs/www.newundertakings.com-error_log
CustomLog logs/www.newundertakings.com-access_log common
</VirtualHost>
#-------------------------------------------------------------
# Domain 3 for this server - nusolutions.biz
#-------------------------------------------------------------
<VirtualHost 192.1681.1.11:80>
ServerAdmin me@mydomain.com
ServerName nusolutions.biz
ServerAlias www.nusolutions.biz
DocumentRoot /wwwroot/htdocs/nusolutions
LogLevel info
ErrorLog logs/www.nusolutions.biz-error_log
CustomLog logs/www.nusolutions.biz-access_log common
</VirtualHost>

Can anyone assist with this? I'm totally stumped at this point.
Responses are greatly appreciated.

Dunno if this is the original file, but if it is, look at this line:

<VirtualHost 192.1681.1.11:80>
Last time I checked, 1681 isn't a ipaddress u can use :P

DOOOOOOOHHHHHHH!!!!!!!!!!!!!

Thanks. That's 5 days wasted for being Stuck On Stupid (SOS)!!!!