To remove te old driver and diagnostic program do next steps:

1. Remove all Link Services created from SNA Manger.

2. Remove all follow files:
	<SNA home directory>\system\sangdtsd.dll
	<SNA home directory>\system\sangsdlc.hlp
	<SNA home directory>\system\sangsync.sys
	<SNA home directory>\system\sangx25.hlp
	<SNA home directory>\system\hwsetup\i386\sangsdcf.dll
	<SNA home directory>\system\hwsetup\i386\sangxdcf.dll

3. Remove Sangoma diagnostic home directory (default: C:\SangDiag)

4. Remove two shortcuts from Start | Programs | Microsoft SNA Server :
	Sangoma Links Diagnostics
	Sangoma Links Diagnostics read me
	
5. Run `regedit` from Start | Run. Go to 
	HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SnaBase\LinkServicesInstalled
   and remove the follow two entries:
		Sangoma SDLC Link Service
		Sangoma X.25 Link Service