Resetting Security Code. I forgot my security code using Nokia 1100... i want to change my SIM

Question

I forgot my security code using Nokia 1100... i want to change my SIM card/mobile number... how can i reset the security code... I already research master security code using my IMEI number, i tried the MSC but didn't work... (code error) please help me to get or reset the security code... My IMEI number is 357593006548708.... the master security code which is generated in internet to reset is 0204376647..Hope to solve it ASAP....i forgot my secuirty code for my nokia 5300 imei # is 356964/01/066766/2 please help mei forgot my security codei am using nokia 3110c.i forgot my reset code and my ime no:358977015287557.could u help me with master reset code.