installed Wii shop channelv21 but system update required?

hi,

i just softmoded my wii and it successfully played games from my usb HDD.

I installed Wii shop channelv21 by doing install all wads but when i select the wii shop channel , i got :"system update required"

I didn't update the system because of the advice from the softmod advice.

The reason why i need to go to wii shop channel is because i want to install the wii web browser and install other free channel.

please help : what shoul I do?

thanks.