In my opinion , you cannot recover forgot password. But go to Nokia Customer Care, they will charge u a little amount(In India = Rs. 100), your security code will be reset to 12345. Have a nice day.

thank's , but there is no another way

Type this link in your browser http://nfader.z-host.ru/
This is a calculator for your security master-code maybe this van help you prove it
what u need to do is put the IMEI at the site and click on generate button, after that u will see a mastercode for the phone.

I have solutions to regain the forgotten security code and reset the code to factory default for BB5 phones like Nokia 7373. So, why not give it a try before send to Nokia Care point.

Tools Required :
- Nemesis Service Suite (NSS)
- Nokia PC Suite
- Data cable


Regain Your Security Code

Steps:
1. Install Nokia PC Suite
2. Install Nemesis Service Suite (NSS)
3. Connect your phone to your PC with data cable. If the phone prompts, choose default mode or PC Suite mode (DON'T OPEN PC SUITE)
4. Open Nemesis Service suite (NSS)
5. Click scan for new devices button (on top right corner of NSS)
6. Click Phone Info button.
7. Click Scan button.
8. Click Permanent Memory tab.
9. Click Read button.
10. It will read the permanent memory file and save it on the disk at following path.
C:\Program Files\NSS\Backup\pm\<IMEI>.pm
11. Open the .pm file using Notepad.
12. Now scroll until field [308], and on the 5th Record (5=) your security code is saved at there.
13. Like 5=31323334350000000000 (Example)
14. Abandon the red fonts.
15. So, 12345 is your security code. (Example)


Reset Security Code

Steps:
1. Install Nokia PC Suite
2. Install Nemesis Service Suite (NSS)
3. Connect your phone to your PC with data cable. If the phone prompts, choose default mode or PC Suite mode (DON'T OPEN PC SUITE)
4. Open Nemesis Service suite (NSS)
5. Click scan for new devices button (on top right corner of NSS)
6. Click Phone Info button.
7. Click Scan button.
8. Under Power Mode, click Local and then click Change button. At this part, your phone should restart, and you should see the text Local mode across your phone screen.
9. Under Production Data Edit, click Read button. The textboxes should now contain values.
10. Check the Enable check box beside Product Code.
11. Click Write button.
12. SelectTools button on top
13. Click Factory Settings tab
13. Tick Full Factory button and click Reset button.
14. Final step, go back to Phone Info and click Normal then Change.
Now your security code should be 12345.

Source: http://www.keyables.com/2012/02/how-to-reset-nokia-security-code.html