geometry optimization with CAS



 Dear Netters...
 I want to optimize the geometry of a diatomic molecule
 using CASSCF (implemented in Gaussian98).
 Seems easy, but it is not.
 I tried with the following input:
 %chk=file.chk
 #T HF/cc-pVDZ sp
 0 1
 H
 F 1 0.9
 --Link1--
 %chk=file.chk
 #T CAS(6,10)/cc-pVDZ scf=(tight, maxcycle=100) opt guess=read
 0 1
 H
 F 1 r
 r=0.9
 And with this, I obtain only garbage. The program turn crazy :-)
 Some suggestion?
 Cheers...
 Antonio Buljan