Posting date

Hi ,

when iam using t.code VL06O , there iam selecting 'For Goods Issue'..after clicking on that tab..there iam giving the date and executing ..then it will show all the deliveries which has not did Post goods issue..there iam selecting one delivry no. and clicking post goods issue button then it will show the posting date which is in editable mode..i want this posting date should be in non editable mode...

regards

vishnu