InstallShield X not able to add Single Value to Registry Entry

I am making a Windows Installer using InstallShield X. I am not able to add single value to Registry.

Like in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NetworkProvider\Order

ProviderOrder key Value is WDNP32,Mvfs,RDPNP,LanmanWorkstation,WebClient , now to this i want to append a comma seperated value like ,Test. But i am not able to do that开发者_运维技巧. If I am making entry with whole value during uninstallation it removes windows entry and my system shows blue screen during restart.

Any help is appreciated. Thanks.

Since you don't say what you've put in for the value, I'm assuming you've not already tried [~],AppendThis. That might work (per the Value column of the Registry Table). Although in general, I shy away from modifying anything under CurrentControlSet directly.