PPTP VPN connection troubles

[networkninja06]

I am having issues trying to get a PPTP VPN connection to go from a Cisco 3000 VPN Concentrator to a Linksys BEFVP41 VPN router. The internet connection is coming from a Linksys WRT54g3g Wireless mobile broadband router using a Sprint wireless card. I am able to get the tunnel to connect momentarily. When I look in the log for the VPN concentrator this is what I see.

4112 04/09/2007 16:03:01.410 SEV=4 PPTP/47 RPT=1221 xxx.xxx.xxx.xxx
Tunnel to peer xxx.xxx.xxx.xxx established

4113 04/09/2007 16:03:02.090 SEV=4 PPTP/42 RPT=941 xxx.xxx.xxx.xxx
Session started on tunnel xxx.xxx.xxx.xxx

4114 04/09/2007 16:03:06.760 SEV=5 PPP/8 RPT=844 xxx.xxx.xxx.xxx
User [Test]
Authenticated successfully with MD5CHAP

4115 04/09/2007 16:03:07.830 SEV=4 PPTP/15 RPT=771 xxx.xxx.xxx.xxx
Unexpected Clear-Request from xxx.xxx.xxx.xxx, id 39424

4116 04/09/2007 16:03:07.870 SEV=4 PPTP/10 RPT=1142 xxx.xxx.xxx.xxx
Invalid length control message (0) from xxx.xxx.xxx.xxx

4117 04/09/2007 16:03:07.870 SEV=4 PPTP/35 RPT=940 xxx.xxx.xxx.xxx
Session closed on tunnel xxx.xxx.xxx.xxx (peer 31890, local 46828, serial 0), reaso
n: Error (No additional info)

4119 04/09/2007 16:03:07.870 SEV=4 PPTP/34 RPT=1235 xxx.xxx.xxx.xxx
Tunnel to peer xxx.xxx.xxx.xxx closed, reason: None (No additional info)


Does anyone have any ideas about this? I have looked through what I could find about the errors, but as you can see they are not very helpful. Any help on this would be appreciated.