Field Explorer help, not all Database Fields available

Question

Greetings all, I'm new to Crystal Reports (version XI by the way) and Tigerpaw.  I've had some great luck editing existing reports to the specifications we've needed thus far.  But now I've run into a real problem, it seems small, but it's important to me. 
The one change I'm unable to accomplish on our new invoice report:
-Adding the Tigerpaw field, Account Name, to an invoice.  The "Account Name" field is a field pulled from the tblAccounts Database Fields category in the Field Explorer.  But when I'm in my invoice template, I do not have that category available, I only have tblSysListViewPrint and tvwr_Invoices categories, the latter does have the field for "Account ID" which is close for our purposes, but not the same.  So how might I go in and pull from the tblAccounts category...specifically to get the  tblAccounts.AccountName field.  Copying that field from another existing report does not work either, "one or more formulas fail to compile".
I'm not sure how it decides what Database Fields to pull from, because on other reports, the tblAccounts category is available, but not the tvwr_Invoices category, so I am quite confusedl.
Hopefully this makes sense to someone out there. 
Thanks.

Answer 1

Thanks, V361,
When I go to create a blank report, I get no databases available.  My first prompt is the "Database Expert".  The "available data sources" list is Current Connections (no items), Favorites (no items), History (no items), and Create New Connection.  The "selected tables" list on the right is blank.  I honestly don't have a clue how connect to whatever server contains those items.  I realized since I first posted that I need to figure that out to make any progress.  All the created reports already have the database field categories set up already, but it looks like all the available fields were not initially chosen for the reports.
So what I believe it comes down to is the fact that I need to figure out how to "Create New Connection" to find my available database fields.