GetBulk timed out

Hi,          
    We are using NET-SNMP  based agent for testing our company's products.
When this agent gets a GetBulk request with 7 OIDs in the var-binds (num rep
= 0, max rep = 50), the request gets timed out.  GetBulk requests are
serviced fine if there is only one OID in the var-binds.  Each OID
corresponds to a row in a table.  We tried changing the SNMP_MAX_MSG_SIZE,
SNMP_MAX_PDU_SIZE and even SNMP_MAX_LEN (in snmp.h), but the request keeps
timing out.  The same GetBulk request (with 7 OIDs) worked when the max rep
was set to 5 (instead of 50).  Can anyone help us out?
 
Thanks,
Bharath and Vasisht,