iis8.5 failover cluster

dear all

i have two nodes with windows 2012 r2.

and i'm trying to configure for iis8.5.  it was  configured with vbscript of iis7.0 which help as below link

http://support.microsoft.com/en-us/kb/970759

Now, completed configuration on the A node. and failover to B node using the script test failed withevent id 1233 :

For a clustered Generic Script instance, the correct functioning of the script is very important in determining whether the combination of Cluster service, script, and application will work together to increase availability.

but failback is OK.

What's the problem? 

Please anyone help me.......