Hi, modprobe ipw2200 return following errors : ipw2200: Unknown symbol ieee80211_get_crypto_ops ipw2200: Unknown symbol ieee80211_wx_set_encode ipw2200: Unknown symbol ieee80211_wx_get_encode ipw2200: Unknown symbol ieee80211_txb_free ipw2200: Unknown symbol ieee80211_crypt_delayed_deinit ipw2200: Unknown symbol ieee80211_wx_get_scan ipw2200: Unknown symbol ieee80211_freq_to_channel ipw2200: Unknown symbol ieee80211_rx ipw2200: Unknown symbol ieee80211_channel_to_index ipw2200: Unknown symbol ieee80211_rx_mgt ipw2200: Unknown symbol ieee80211_get_geo ipw2200: Unknown symbol free_ieee80211 ipw2200: Unknown symbol ieee80211_is_valid_channel ipw2200: Unknown symbol alloc_ieee80211 However I installed ieee80211.