Inspection lot not getting generated for schedule in stability study

Dear All,

Need your urgent help to solve a issue. I need to perform inspection of material after specified interval of time for which i am using stability study process. Following are the steps which i have followed :

1) Create initial sample (physical sample created)

2) Confirm initial sample

3) Initial test inspection lot( Inspection lot created )

4) Complete initial test

5) Specify storage conditions (Physical sample created with CRTD status)

6) Create testing schedule( Maintenance schedule is created )

7) I have scheduled maintenance plan through IP10 tcode. All the calls are getting generated.

Now i have given manual call in IP10, but inspection lot is not generating.

Please help to solve this issue ASAP.