As a side note, I caution against blinking (flashing) as for some people it triggers physical reactions. I tend to just make the border turn red and push them back to said control if they try to go to another record including a new one.
You are not alone:
Note, if you have Access 2010 or 2013 you should be good.
As a side note, whenever you get that message that is the reason. With the Statement you need to change the double quotes to single quotes and only have the double quotes for line continuation. It was thinking your double quotes were at the end of the line and\or Statement and...