ia01-operation description-over 19 entries not coming in bdc uploading

Hi experts,

i am facing one one problem when uploading operations description data. Here iam able to upload upto 19 records, if records are more than 19, it is not uploading in that screen . how to add more entries than 19 into that screen.

screen number is 'SAPLCPDI' '3400'.

adavnce ..........thanks and regards

asrreddy