At a guess, it looks like you are either getting a raw feed of binary data (e.g., an image), or what you are displaying is actually a link to an external table that stores large text fields (a practice recommended by some experts).

IMHO, your best option is to ask your DBA what kind of field you are dealing with, and how to appropriately bring it into the report.  Given that we don't know your application, and you are "not technically minded," this discussion here is likely to be a lot of shots in the dark, hoping to find a target.

What?  An improperly documented schema?  I'm shocked.  Shocked, I tell you.  I've never seen the like in my life!  (And I can assure you that all of my schema are thoroughly, properly, and accurately documented.  Yes sirree....)