Vista - isdn drivers

Hi guys, for starting i wanna give my excuses for my bad english and knowedge about pc but i'll do my best.
I got an isdn connection and when i've changed my pc i got blue screen with the error irql_less_or_equal caused from isdn.sys file.
I've try to change modem (from hamlet modem to trust isdn modem) and so (from xp to vista) but i got always the same error.

This is my pc *************************************************************
********************** Computer Info ************************
*************************************************************
Logged in user: needlineaubba\Andrea
Computer Model: P5K-E
Computer Manufacturer: System manufacturer
OS Name: Microsoft® Windows Vista™ Ultimate |C:\Windows|\Device\Harddisk0\Partition1
OS Version: 6.0.6001
System Type: X86-based PC
Total Physical Memory: 2046 MB
Windows Directory: C:\Windows
BIOS Version: BIOS Date: 03/21/08 09:56:22 Ver: 08.00.12
CPU: Intel(R) Core(TM)2 Duo CPU E6850 @ 3.00GHz
Video Card: ATI Radeon HD 4800 Series
Resolution: 1440 x 900 x 4294967296 colori

and this is the error that i got:
BCCode: d1
BCP1: 00000000
BCP2: 00000002
BCP3: 00000000
BCP4: 8DA19474
OS Version: 6_0_6001
Service Pack: 1_0
Product: 256_1

If you need more information tell me what i have to do.
Thank you