SQL Server real-time blocks in CRM 2011

Create Proc p_GrantInheritedAccess
@ReferencingObjectId        uniqueidentifier,
@ReferencingObjectTypeCode     int,
@ReferencedObjectId        uniqueidentifier,
@ReferencedObjectTypeCode    int

As
Begin
SET NOCOUNT ON

--  For a new entity (Create scenario) ReferencingObjectId is not shared to any principal yet.
-- This check reduces by 50% cost of execution for create scenario (no sharing for referencing object exists)
if (exists(select ObjectId from PrincipalObjectAccess poa1 with(NOLOCK) 
where poa1.ObjectId = @ReferencingObjectId 
AND poa1.ObjectTypeCode = @ReferencingObjectTypeCode))

Begin
-- Update Existing rows in POA that indicate that the referencing object was already 
-- shared to the principals that have share access to the referenced object

UPDATE poa1
SET InheritedAccessRightsMask = poa1.InheritedAccessRightsMask | poa2.AccessRightsMask | poa2.InheritedAccessRightsMask | 0x08000000
FROM PrincipalObjectAccess poa1 JOIN PrincipalObjectAccess poa2 ON (poa1.PrincipalId = poa2.PrincipalId)
WHERE poa1.ObjectId = @ReferencingObjectId 
	AND   poa1.ObjectTypeCode = @ReferencingObjectTypeCode
	AND   poa2.ObjectId = @ReferencedObjectId
	AND   poa2.ObjectTypeCode = @ReferencedObjectTypeCode
End

-- This check reduces by 50% cost of execution (no sharing for referenced object exists)
if (exists(select ObjectId from PrincipalObjectAccess with(NOLOCK) 
	where ObjectId = @ReferencedObjectId 
	AND ObjectTypeCode = @ReferencedObjectTypeCode))
Begin
-- insert new rows for principals who were shared the referenced Object but not
-- the referencing Object

INSERT into PrincipalObjectAccess 
( PrincipalId, PrincipalTypeCode, ObjectId, ObjectTypeCode,AccessRightsMask, InheritedAccessRightsMask)
SELECT	PrincipalId, PrincipalTypeCode, @ReferencingObjectId, @ReferencingObjectTypeCode, 0, 
		AccessRightsMask | InheritedAccessRightsMask | 0x08000000
FROM	PrincipalObjectAccess
WHERE	PrincipalId NOT IN (SELECT PrincipalId 
			FROM PrincipalObjectAccess 
			WHERE ObjectId = @ReferencingObjectId 
			AND ObjectTypeCode = @ReferencingObjectTypeCode)
	AND ObjectId = @ReferencedObjectId
	AND ObjectTypeCode = @ReferencedObjectTypeCode
End

End

I am getting SQL Server real-time blocks in CRM 2011. Please let me know if anyone has any idea when exactly this stored procedure calls in CRM 2011.