problems with xbox live and access points

i have a speedstream 4200 ethernet/usb adsl modem. and a belkin enchanced wireless router. model number- f6d4230-4 v1.

i put a access point on my router and now my xbox live will randomly get disconnected and when it disconnects me my modem will have the dsl light flashing. but without a access point mine and my sisters laptop will not connect to our belkin router.

on the system log on the speedstream router management says this

P0000-00-00T02:20:30 E |DSL |Last DSL message repeated 1 times.P0000-00-00T02:20:30 E |DSL |State: INITIALIZINGP0000-00-00T02:20:42 E |DSL |HYBRID 1P0000-00-00T02:20:42 E |DSL |Link up 2 US 766 DS 7196 (INTL:ADSL2+)P0000-00-00T02:20:43 E |PPPoE |oe00: tx PADT, id: 1634, ac: (NULL), sn: (NULL), MAC: FF:FF:FF:FF:FF:FFP0000-00-00T02:20:47 E |PPPoE |oe00: tx PADI, id: 0000, ac: (NULL), sn: (NULL), MAC: FF:FF:FF:FF:FF:FFP0000-00-00T02:20:51 E |PPPoE |Last PPPoE message repeated 2 times.P0000-00-00T02:20:51 E |PPPoE |oe00: rx AC Name: cmrcgalrb00-se800-8Y214120602887P0000-00-00T02:20:51 E |PPPoE |oe00: tx PADR, id: 0000, ac: (NULL), sn: (NULL), MAC: 00:30:88:23:3C:CAP0000-00-00T02:20:51 E |PPPoE |oe00: rx PADS id: 13A8 MAC 00:30:88:23:3C:CAP0000-00-00T02:20:55 E |PPP |LCP neg PAPP0000-00-00T02:20:55 E |PPP |LCP upP0000-00-00T02:20:55 E |PPP |IPCP nak option: 3P0000-00-00T02:20:55 E |PPP |IPCP nak option: 129P0000-00-00T02:20:55 E |PPP |IPCP nak option: 131P0000-00-00T02:20:56 E |PPP |IPCP up ip: 69.40.117.156, gw: 69.40.112.1P0000-00-00T02:20:56 E |PPP |IPCP dns: 166.102.165.11, 166.102.165.13P0000-00-00T02:31:07 E |DSL |Link DownP0000-00-00T02:31:07 E |PPP |LCP downP0000-00-00T02:31:07 E |PPP |IPCP downP0000-00-00T02:31:07 E |DSL |State: WAITINGP0000-00-00T02:31:19 E |DSL |State: INITIALIZING

 

any1 no how to fix it from lagging me out