problem with checkrad

Hi, I am facing problem with checkrad in icradius. I am sorry for mailing this question on this mailing list because i could not find solution any where.We have recently added ascend MAX TNT in list of NAS, before that simultenous use was working fine, now with Max simultenous use is not working, in checkrad logs i have found that session id is 8 digits long but in NAS session id is 9 digits long so it get the user login. If any body has solution for this please help. Thanks, fam