I have a 5200 phone

Hi alikhaled,
you didn't specified if it is a Nokia5200( MicroSD card) or a LG5200 (MMC Card), but here it goes to MMC cards anyway:

• Firstly, you need to install FExplorer, a free file manager that allows us to browser through S60 file system.
• Next, launch FExplorer and then browser to c:\system folder. There is a file, called mmcstore.
• Rename the file to mmcstore.txt and then open it. Your password must be several characters at the end of the file.

Unfortunately, there is no way to recover the password in the latest S60 phones. The only way that I know so far is by reformatting the memory card. It can be done from Memory Card application by selecting Options | Format memory card menu. Of course, you will lose all your data in the memory card…