Automatic restsart in repeater mode

two dwl2100, one as ap, one as repeater,(ant 14dbi) connecting a dwl 3200 ap via switch with an 18db omnidirectional antenna, connecting new dwl 2100 to that antenna again as repeaters, the last three times didn't work well. device could only connect if the connecting comp is not configured as dhcp...on an other location even with static ip the device tends to shut down automatically and restarts direct after...any idea?
i am located in costa rica...
developing a wireless network for residential area...
thanx nis