Can't connect thru a Linksys WRT400N router

I have a Cox cable modem and a Linksys router.  If I connect directly with one computer to the modem, my Microsoft PPTP VPN client works fine.  When I put the router in the middle, I can see the clinet hit my vpn router to try to open a tunnel but the connection attempt times out.  Spent 2 hours with Linksys but no luck--they said the router was bad so got a replacement and, of course, it did the same thing.  I have had success doing this with other Linksys routers even with multiple clients accessing my office vpn at the same time.  Have tried all the normal stuff--checking the vpn passthru boxes, forwarding ports, putting in the dmz, etc. but nothing works.  Have seen many, many issues with this.  Should I just give up on Linksys and try a Netgear ?
mshaunAsked:
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ComputerTroubleshootersCommented:
Did you try reducing the MTU on the Linksys itself to see if this could be an issue?

Just a thought.
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mshaunAuthor Commented:
Tried that-no luck.  Buying a netgear for $20 less fixed it.
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ComputerTroubleshootersCommented:
LOL. Firmware issue...that was....

Take care.
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