I added PATA HDD to my desktop which has 3 SATA HDD's & 1 DVD Writer with dual boot options of WinXP & Win7. After adding the PATA HDD on the IDE slot & start up, it appears in BIOS, but after start up read/write operations on the PATA HDD is not possible. How do I correct this in WinXP OS, since it does not even register, but in Win 7, it Shows up in BIOS & in My Computer window, but read/cut/write operations on the PATA HDD is not possible. However it can copy data from PATA HDD.??