Arun,
Did you create events and expressions for process schema evaluation to guide your workflow to corresponding schema definition?
You can go to SPRO -> SAP Implementation Guide -> SAP Supplier Relationship Management -> SRM Server -> Cross-Application Basic Settings -> Business Workflow -> Process-Controlled Workflow -> Business Process Configuration -> Define Process Levels
Then you can verify your Process Schema Evaluation and Process Schema Definition. Select corresponding Definition go to Process Level Configuration on left menu. Please re-check level type and task ID for all level sequence number.
Run it again and trace it in SLG1 for correct evaluation and tasks.
Hope it helps,
Daniel Demetrio