Need help after root :P

So here it goes....i jst rooted my samsung galaxy grand neo plus GT-i90601 following the methods of XDA forum and i was successful :D . But after rooting my device my screen rotation doesnt work anymore even after finding the solution for my problem on XDA and on other forums the solution doesnt work on my device!!!.....and also a red exclametory mark appears on the left upper corner of the device when charging or when starting the device... all this problems are happening after rooting my device.....so pls could u find the answer to my problem and tell me...it would be very kind


Thanks