tax interface

I have defined my tax book .

Current period is set as 2011 .

Now i have copied all the assets from coorp book to this tax book .

Now i want to update just two columns YTD DEPRN and deprn reserve 

for the assets in tax book thru fa_tax interface .

I am using below script for the same 

insert into fa_tax_interface

(asset_number, book_type_code,ytd_deprn,DEPRN_RESERVE, posting_status)

values (trim('abc'),trim('abc'),5,5,trim('POST'));

after having run upload tax interface i m not getting these values there ..

Can any one help me what i am doing wrong here ..