casio se-s2000 decimal point display

Hi

I have a Casio Se-S2000 till register.

Everything was working fine until recently. I have all the departments pre-programmed etc and they work fine.

However, recently the display and printed receipt is coming out a little funny.

If i enter £3.00 for Dept1, on the main display it shows as £03 00??

When the SUBTOTAL and CA is press the receipt also displays the amount as £03 00 for DEPT1

IF i have 3 purchases in total for Dept 1 @ £3 each then then receipt will print

DEPT1 £03 00
DEPT1 £03 00
DEPT1 £03 00

TL £09 00

???

Does anyone know how to fix this problem?

I just want to revert back to the way it was, ie. £3.00 etc and total sale of £9.00

Many Thanks

A