Forwarder on reseller not forwarding mail to Gmail inbox

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http://serverfault.com – I have a reseller hosting account to serve my websites, but use Google Apps for email. I control the DNS on my domain name, so I have an A record pointing www traffic to my reseller account, but MX records so my emails are routed to Google. My primary domain is mcbwebdesign.co.uk. I host a lot of sites so have custom name servers (ns1.mcbwebdesign.co.uk and ns2.mcbwebdesign.co.uk) on these other domains which point to my reseller. I have a second domain, wrestlingnetwork.co.uk, hosted on the same reseller and using the aforementioned name servers. In my reseller cPanel, I've set up a forward (HowTos)