IF ISBLANK Error in Formula

I have a named table on a worksheet that I am trying to use to track weekly bank transactions, much like a checkbook register. I am using the following formula to determine if the row contains a deposit or withdrawl and then this SHOULD add or subtract for the value above based on the conditions. However, when I enter the formula I get an error stating that there is an error in your formula and nothing more helpful than that.

Formula:

Please Login or Register  to view this content.

My table is as follows:

trans.PNG

I have a similar formula on a working transaction log that looks exactly like this, with the exception of the named table, that formula is below.

Formula:

Please Login or Register  to view this content.

that table looks like this:

bnk.PNG

Can anyone see the error in the first formula, as this has me stumped??

Thank you

wow, don't know if I feel more like a dumbass or stevie wonder!! Thanks so much, sometimes another pair of eyes is needed to solve the simplest of things. works great now, thanks again for pointing that out to me.