Hi Venu,
I said you can move right to left. not left to right. at left side which are in blue color, not changeable.
You juse need to play with all above options once again. other wise check at SAP market place. might due to upgrade there might be probles. Check for problem EHP67 upgrade related data source issues.
If fields are not visible at RSA6,
You need to check at table ecc side Table - ROOSFIELD, Field SELECTION if any field have as'A" its hidden ot not, then no problem.
If you see unavailable fields at LBWE, Maintenance, right side(Comm str)--> move them to left and save the changes. click on data source and do selection/hide/. activate data source. later you can check at RSA6.
Even though not visible, raise to SAP.
Thanks