IMEI 0049xxx operation successful but not changed

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Hello,
im having a problem repairing the IMEI of S3 i9300 IMEI: 00499901064000
Serial no. was 0000000 and was able to repair it using

this is what i did:

first i tried repairing IMEI (stock firmware 4.3 was installed) and rooted using file given in nspro website but it did not work because it was showing waiting for UART... connection failed...

now i installed I9300XXELL4_I9300DBTELL1_DBT (4.2.1) and rooted

and tried to repair the IMEI , now the whole operation was till the end successful but only the serial no. was corrected and the IMEI still 00499901064000

i need help please because i cant make any calls

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Problem solved using Nspro 6.5.3!!!!