Ticket enc types

[Tsach Moshkovits]

Dear developers,
When sending a service ticket to the service server, I'm getting :
"Bad encryption type"
while verifying the ticket (I'm using krb5_rd_req at the server-side).

I believe the service-server's keytab is fine but I suspect the ticket enc
type (which is "ArcFour with HMAC/md5" ) is 
not supported by the service server. when acquiring service ticket, is it
possible to ask for different enc type? 
I can see how to control the session-key type when using
krb5_get_in_tkt_with_password()
but not the ticket enc type (I'm using krb5_mk_req() to get the service
ticket).

Any help will be appreciated

Tsach