Unexpected Error Code 51330 while using Wii online

Last night, I had my Wii online and unexpectedly this error code appeared, “Error Code 5330. ”
I had done various research and followed the instructions that they had provided. I found out that once the WEP is turned on, the Wii displays this type of error message.
And so, I adjusted the broadcasting channel of the Linksys wireless router that I have, into Channel 3 for faster download and accessibility speed. The router is now broadcasting in the mixed mode. Afterwards, I turned off the router and then refreshed it and immediately, the internet connection resumed.
It was doing fine for about fifteen minutes but the same error occurred.
What should be done now? Help me. Thank you.
