First of all, I thought you said you had 2.81 in the other post here:
[GUIDE] Downgrading a TA-082 2.71 PSP to 3.03 OE-A/B
Second of all, there is no firmware "3.01 oe1"... Go to system settings and check your firmware.
Third of all, recovery mode is not built in the PSP when you buy it. You can only have it when you flash Dark_AleX's custom firmware. If you do have recovery, hold the power button up for 6 seconds and completely turn off your PSP, then turn it back on holding the "R" trigger.