Shortend Fiscal Year creation error

Hi Experts,

I want to create a short end fiscal year for the month of Apr-Dec 2012.

I created in OB29 with year dependent . following periods..it didn't worked out please advise how to create .( Asset module needs to implement)

Month day period Yearshift

1 31 1 +1

2 29 2 +1

3 31 3 +1

4 30 4 0

5 31 5 0

6 30 6 0

7 31 7 0

8 31 8 0

9 30 9 0

10 31 10 0

11 30 11 0

12 31 12 0

Getting Errors as "Only Defined periods until 009, data can't saved"

Please help me

Srinath