Being vague doesn't help. What do you mean by "monument's aren't being finished" ? Have you checked with the Construction Overseer by right clicking the monument to find out what's wrong ?

it could either be a gitch or be caused by having no food/farms being produced so the work camps don't send out workers. That is if it's not caused by factors explained in the overseer's as stated in the post above

i am getting stone masons and brick layers mixed up. am building only one at a time so think might be some kind of driver can you offer any other suggestions

A driver for your computer will not be the cause. Please read my post: He will tell you exactly why your monument isn't progressing.

I assume you have the materials needed? If this is the first monument in the campaign mode (family history), you'll need to import bricks as you can't make them locally. Click on the world map button on the right (hover until you find the right tooltip, it's to the right of overseers), then use the arrow keys to move down to find the other cities. Click on one to see what they sell, and when you find the one which sells bricks, click on the open trade route button. Then just tell your commerce overseer to keep as many as you want stocked at a time (at least 400 will be needed I think, or they won't drag any), and make sure you have a warehouse the traders can reach which accepts them.

I remember a glitch a while back where imports of plain stone would suddenly stop (which would then render the monument un-buildable). I don't remember the exact scenario this happen, nor was this the GOG version of Pharaoh, but maybe that's your problem.

Though I've no idea how to fix it, so if this is the problem then you're probably screwed.

Also, if your monument is stuck at 99% completion while you have everything available (workers, stone etc) than try the following solution I have found on Heaven Games: http://pharaoh.heavengames.com/faqs/monuments.shtml#q10

First and foremost make sure that you have a carpenter's guild and a warehouse with some wood.
The carpenter's guild should have access to that warehouse so that it itself can be stocked with
wood. Another thing that is easy to miss is burial provisions that have to be sent to the monument.
There is an advisor for that.
Other than that it could be that your guilds and or workcamps have become understaffed which can very
easily happen in a long game as your workforce ages and retires.

In the event of an incomprehensible stop in the construction of the Monument:
- Always make a save before starting to build a Monument;
- Do not send Funeral Resources until construction is completed;
- Building is tied to a percentage of the Monument Rating, and sending Funerary Resources shifts those percentages and creates an infinite wait glitch.
Also, sending Funeral Resources early makes it possible to steal them!
- Try deleting (then immediately select "Cancel") the Guilds, the Laborers' Camp, and even the Monument itself;
This is because the game assumes that the worker is 100% likely to complete his task, while the worker along the way may die (Nile flood, crocodile, enemies) or glitch (Ferry, stuck in buildings or terrain)
- Try to remove and rebuild all the Guilds and all the Laborer's Camp;
- Make sure the Laborers Camp is not behind the Ferry;
- Maybe due to the fact that the Monument is close to the water;
- Try use Options => "Pyramid Speedup"-ON

What is Options=>"Pyramid Speedup"-ON
(this option appeared in the +Cleopatra add-on, i.e. from version v2.0)
The Blessing of any God has a chance to turn into a Blessing of Accelerating Monument Construction.
In fact, the Gods build the Monument for you, generating building materials from nowhere.
This is especially useful when building a Monument using imported building materials.