Axapta3.0 sever terminated connection to client when migrated from oracle 9i to 10g standard

Hello,

We are using Axapta 3.0  and DB Oracle 10G Standard

We have recently migrated oracle database 9i to 10 G standard version hence forth we are

getting this error randomly once more than one user is login:

and

1 .V 60535473 6149387d 07f3ad70 07f3a52c     Mod:  oracommon9[oracommon9.dll], base: 60500000h

  2 .V 6149387d 606e550e 07f3ad88 07f3a52c     Mod:  oran9[oran9.dll], base: 61480000h

  3 .V 606e550e 606a568d 07f3ca30 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  4 .V 606a568d 60693e57 07f3ca64 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  5 .V 60693e57 606747d0 07f3caa0 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  6 .V 606747d0 60675a20 07f3e768 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  7 .V 60675a20 60601bda 07f3e7c4 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  8 .V 60601bda 010b6d57 07f3e7f0 07f3a52c     Mod:  OraClient9[OraClient9.Dll], base: 60600000h

  9 .V 010b6d57 004c5a3c 07f3e818 07f3a52c     Mod:  OCI[OCI.dll], base: 010b0000h

 10 .V 004c5a3c 00000000 00000000 07f3a52c     Mod:  Ax32Serv[Ax32Serv.exe], base: 00400000h

Stackdump exit code 487 (Attempt to access invalid address)


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Object Server MIG: Exception 0xc0000005 occured in thread 0x15f8 handling session 145.

For more information, see Help and Support Center at go.microsoft.com/.../events.asp.