modem problems

usr sportster 3597, rabotal bez problem okolo goda, a seichas vdrug perestal rabotat' tonal'nii nabor, sistemu pereustanavlial, bez rezul'tatov. a vot v win XP rabotaet bez problem. vprochem i v win98 v hyper terminal esli nabiraiu nomer comandoi (atdt) to toje rabotaet, a po drumogu - net, tol'ko pul'sovii nabor. slishno tol'ko ochen' tiho kak modem nabiraet nomer i vsio, nikakovo otveta ot udal. compiutera. est' kakie-libo idei?