Concurrent Parameters Display Values

Concurrent Program

1)

SEQ= 10

p_Account_Number
Value set -> SQL Statement
Default Value -> select Account_NUMBER from XXBG_FUN_BATCH_NUMBER_V WHERE Account_name=:$FLEX$.p_Account_Name

2)

SEQ=20

p_Account_Name
Value set -> SQL Statement
Default Value -> select Account_name from XXBG_FUN_BATCH_NUMBER_V WHERE Account_NUMBER=:$FLEX$.p_Account_Number

This is only working when we use flex value in SEQ= 20 however it is not working when we use for SEQ= 10.

Can you please let me know how to make it working when I select account number then it should display corresponding account name and vice versa.