I can not create new Purchase Orde

Question

Hi experts,
I have a problem, i am tryin to create a new Purchase Order by the portal, i go to tab Purchasing, and after, i click in Purchase Order. Appear a new windows, where i have to select the system:
- Local SRM System where appear different purchase order
- R3 US Back end where not appear nothing.
If i select one of the Local SRM System, and click in create button, appear an error: 
Purchasing group could not be determined; inform system administrator.
What happend?
Thanks in advance,
Regards,

Answer 1

I solve this problem, but now appear an error:
Purchase orders cannot be created without IPC pricing
If i execute the program:  bbp_cnd_customizing_check appear:
System    : SRM           Client    : 800        Release   : 701
Date      : 13.05.2010    Time      : 10:34:45   User      : FUNCIONAL
Host      : srv-bl02      Op.Sys.   : Windows NT Database  : MSSQL
Inst. No  : 0020563755
IPC
SRM Release: 700          SRM Patch Level:  0007
IPC Version:
     Classic Light Pricing is Active
     Group Conditions are not Used
     IPC is now running in VMC
Technical Basic Settings
     CRM Object Generation Correct
     Crcy Customizing CURRKEY 3 Correct
     Time Zone Parameter Defined
     Context BBPCONTRACT Defined Correctly
     Calculation Schema 0100 Exists
Plausibility of the Customizing Settings
     16  Condition Types Defined
     13  of Condition Types are Defined in Calc. Schema 0100
         Condit. Type    0RHA  is not in Calculation Schema 0100
         Condit. Type    0ZHA  is not in Calculation Schema 0100
         Condit. Type    0ZHP  is not in Calculation Schema 0100
     11  Condition Types/Tables Defined in Conds Group 0100
     8   Cond.Types/Tables Defined in Conditions Group 01CO
     5   Condition Types/Tables Defined in Condition Group 01HD
         In 01HD: Condition Type          0RHA Scales Defined
         In 01HD: Condition Type          0ZHP Scales Defined
         In 01HD: Condition Type          0ZHA Scales Defined
         In 01HD: Condition Type          01AG Scales Defined
     4   Condition Types/Tables Defined in Condition Group 01CH
         In 01CH: Condition Type          0RHA Scales Defined
         In 01CH: Condition Type          0ZHP Scales Defined
         In 01CH: Condition Type          0ZHA Scales Defined
     11  Condition Types/Tables Defined in Condition Group 01CC
What happend?
Thnaks in advance,
Regards,