Publication for MetaPredPS
MetaPredPS in publication
[…] undertaken to develop a computational method for the identification of kinase-specific phosphorylation sites, including netphosk , scansite 2.0 , predphospho , gps , plantphos , ppsp , metapredps , netphorest  and kinasephos [-]. the summary information of the previously developed phosphorylation site prediction methods is listed in table s1 (additional file ). particularly, […]
Citation from MetaPredPS site:
"Please note: This version of the meta-prediction server is capable of making predictions only when each of the six element predicting programs is up and functioning. The failure of any element predicting servers will cause the meta-prediction to fail."
One of elements is PredPhospho that does not exist anymore. So this tool will always fail. It seems this server has not been updated for long time.