CRM URL - Object ID (ChaRM, Defects etc)

Hi

I'm at the stage of configuration where I'm wanting to put hyperlinks into my Smart Forms. I came across this interesting article:

http://wiki.scn.sap.com/wiki/display/CRM/Navigation+to+the+CRM+UI+Component+from+Mail+Form+or+Smart+Forms+Hyper+Link

I'm still slightly confused though. For example, I'm trying to create a URL which takes users directly to a Defect Correction (Display). I've copied the URL directly from the Web Client and it is:

http:/XYZ.com:<PORT>/sap(bD1lbiZjPTAwMSZkPW1pbg==)/bc/bsp/sap/crm_ui_start/default.htm?crm-object-type=AIC_OB_CMTM&crm-object-action=B&crm-object-value=0050569200B91EE3AA81DA7A30EAB497

I've highlighted certain parts in red as I'm not sure what this information relates to? However, the CRM Document ID for this Defect is 5000000000.

So I tried to make my own URL as per below:

http:/XYZ.com:<PORT>/sap/bc/bsp/sap/crm_ui_start/default.htm?crm-object-type=AIC_OB_CMTM&crm-object-action=B&crm-object-value=5000000000

However my URL does not work?

What am I missing?  I don't need the Business Role as I have this as a Parameter in SU01. Object TYpe AIC_OB_CMTM definitely appears under my Navigation Bar Profile.  The error I'm getting is:

"No access for action Bc of object type Defect Correction (AIC_OB_CMTM)"

However, I definitely do have access and the URL I provided above in red works.

How do I make my own URL for Defect 5000000000?

Thanks

Shaun