There is a pink box at the top of my reconciliation and I can't get rid of it

If there is a pink box at the top of the reconciliation form, it means that there is something going on that makes your reconciliation form not editable.  That's why you're unable to work on it. 

Causes for a reconciliation form to be non-editable could be:

• The account is non-reconcilable.  The account might be marked as non-reconcilable by a System Admin.  Please contact your System Admin to see if that is correct.
• Preparer/Reviewer/Approver due date not set.  The due dates for the account reconciliations must be set for all owners prior to the rec being able to be worked on. A System Admin must set these due dates.  Please contact your System Admin to do so if this is the reason that the reconciliation cannot be worked on.
• Certification for this period has started.  Certification is a macro-level certification process that is available in ART's Enterprise Plus package only.  Once the date for this certification begin, no more work can be done to the recons.
• It is a reconcilable account and has not been reconciled in one or more previous open / in progress periods.  The account reconciliations in ART must be completed in chronological date order so you'll need to go back to the last period in which that account reconciliation was not completely reconciled and they need to go through the workflow to completion (To a status of Reconciled or System Reconciled).  The only other way around this is to close prior periods in which the account reconciliation is left uncompleted.
• Rec item import processing is pending.  If a mass import of reconciling items or supporting details has been initiated, the rec form will be unable to be edited until it's completed.
• Work for this account has been started in a future period.  Since all of the account reconciliations should be completed in chronological date order, if a recon in one month is left unstarted while it's being worked on in a subsequent month, the prior month's rec will be un-editable.  The only way to work on the prior month's recon would be to have a System Admin 'reset' the subsequent month's work.  This will erase any work done on that reconciliation and put it back to a status of 'Not Started'.