The transmission path HBCI+ must be activated before the first use in Internet banking.  

Check this there: "Services"; "Online SelfServices"; "Other"; "Order Telephone Banking and PIN and HBCI+ activation".

The user ID consists of two parts:

• 3-digit branch number (e.g. 555) +
• 7-digit main account number (e.g. 1234567) +
• 2-digit subaccount number (e.g. 00) 
• For example: 555123456700 

Hints:

• If your account number has less than seven digits, please fill them with leading zeros. (For example, 0123456). 
• If you are unable to activate HBCI+ online access, please contact the customer service of the issuing bank.