Regarding start-of-selection

Hi all,

i have created a program and two transaction.

in the program i have created two selection screen 120 and 130.

while craeting transaction zxx1 i put program name xxx and selection screen 120 and while craeting transaction zxx2 i put program name xxx and selection screen 130.

.Now when i am executing the transaction zxx1 / zxx2 the control does not go to start-of-selection.

can you plz provide me solution,

Thanks in advance