workflow installation error - object reference not set to instance to an instance of an object

Installed as below

--Win server 2008 R2

--Sql server 2012 X64

--Dynamics GP 2010 (MS-GP-2010 V-11.00.2320 HF released by March-2014)

--in gp created 2 sample companies (Fabrikam & another)

--enabled web services for 1 company, not configured web services management console

--installed sharepoint foundation 2010 & configured as new farm (not stand-alone)

--installed workflow, default website & default ports in domain

copied files and started windows installer and throws error

while installing workflow got error

"object reference not set to instance to an instance of an object"

 

Any solution please? 

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