Problem in running I-TASSER

When I run I-TASSER, I meet this problem, please help me , what kind of database is misses for the I-TASSER in my machine? Do I need to re- install the I-TASSER? Where can I get that pair.3 and pair.1 file?
Thank you very much!

renzhi@ubuntu:~/tool/I-TASSER/I-TASSERmod$ perl runI-TASSER.pl -libdir /home/renzhi/tool/I-TASSER -seqname seq.fasta -datadir /home/renzhi/tool/I-TASSER/data -usrname renzhi
Your setting is:
-libdir =/home/renzhi/tool/I-TASSER
-seqname =seq.fasta
-datadir =/home/renzhi/tool/I-TASSER/data
-usrname =renzhi
-runstyle =serial
-homoflag =real
-idcut =1
-ntemp =20
-nmodel =5
1. make seq.txt and rmsinp
2.1 run Psi-blast
2.2 run psipred
2.3 run solve
2.4 run pairmod
2.4.1 removing homology templates based on real and 1
2.4.2 running pair ................
/bin/cp: cannot stat `pair.3': No such file or directory
/bin/cp: cannot stat `pair.1': No such file or directory
3.1 do threading
start threading QQQ