TDS not deducted

 Hi Experts

TDS invoice not generated for  First standard invoice where TDS code attached.

 

We had booked two invoices for the month of jul-10 and Aug-10 respective TDS code “194 J Non Corp”.

 

In july-10 invoice amount was “12581.00” ,and TDS code was attached but  System has not deducted the TDS on this invoice (Since threshold was not crossed that is Rs 30000)

 

Again we had booked invoice in Aug-10 Rs “65000” with TDS code attached to it , System has deducted TDS only for Aug-10 and not for Jul-10

 

We had checked threshold window and both the invoice amount was updated in it

Please help .....................suggest me why system had done this problem