Oracle Database 10g Express Edition – The page cannot be displayed

I’m working with an application using Oracle Database 10g Express Edition. Unfortunately, I experienced a power failure and my PC turned-off. After the power was restored, I turn-on my PC. I immediately go to the Oracle Database Home Page and this message appeared – The page cannot be displayed. I took the following actions but none of them worked.

– I restarted my PC.
– I restarted OracelServiceXE and OracleXETNSListener.

I’m new to Oracle Database and I have no idea on how to deal with this problem. Any help is highly appreciated. Thanks in advance!