Please Help - Microsoft JET Database Engine error '80040e14'

Please can someone help I am new at this, I have a problem with the above error,

I have two files running

1. modifynews.asp - a form to complete
2. modifynewsexec.asp - the exec file that puts the code into a database.

If I want to put more than one line of news into the submit throws back:

Microsoft JET Database Engine error '80040e14'

Syntax error in query. Incomplete query clause.

/modifynewsexec.asp, line 16

I have checked thru the code but cant find out why I can enter one line but no more.

My Code:

modifynewsexec.asp:

<!--#include file="includes/dbconnection.asp"-->

<%
Dim cnnSimple
Dim rstSimple
Dim strDBPath

pmain = request("Mainnews")
pdiv1 = request("div1")
pdiv2 = request("div2")
pdiv3 = request("div3")
%>

<%
' UPDATE DIVISION DATA
SET rstSimple = cnnSimple.Execute ("UPDATE MainNews.* SET Mainnews='"&pmain&"', div1='"&pdiv1&"', div2='"&pdiv2&"', div3='"&pdiv3&"';")
%>

<%
RESPONSE.REDIRECT "adminhome.asp"
%>


ModifyNews.asp:


<!--#include file="includes/dbconnection.asp"-->
<!--#include file="navigation.asp"-->

<%
SET RSTSIMPLE = cnnSimple.Execute ("SELECT MainNews.*, MainNews.Mainnews AS Mainnews, MainNews.div1 As div1, MainNews.div2 As div2, MainNews.div3 As div3 FROM MainNews;")
%>

<%
pmain = rstSimple.Fields("Mainnews").value
pdiv1 = rstSimple.Fields("div1").value
pdiv2 = rstSimple.Fields("div2").value
pdiv3 = rstSimple.Fields("div3").value
%>
<form action="modifynewsexec.asp">
<font color="#7DACFB"><h3>Main News Update</h3><%pmain%><font size="-3">To Enter a Line Break You Cannot Just Press Enter You Must Type < br ></font></font>
<textarea cols="70" rows="5" name="Mainnews" style="background-color: Silver;"></textarea>

<font color="#7DACFB"><h3>Division 1 News Update</h3><%pdiv1%></font>
<textarea cols="70" rows="3" name="div1" style="background-color: Silver;"></textarea>

<font color="#7DACFB"><h3>Division 2 News Update</h3><%pdiv2%></font>
<textarea cols="70" rows="3" name="div2" style="background-color: Silver;"></textarea>

<font color="#7DACFB"><h3>Division 3 News Update</h3><%pdiv3%></font>
<textarea cols="70" rows="3" name="div3" style="background-color: Silver;"></textarea>

<br>

<input type="submit" name="Submit">

&nbsp;

<input type="reset" name="Reset">
</form>


The dbconnection.asp file :

<%
strDBPath = Server.MapPath("database/darts.mdb")

Set cnnSimple = Server.CreateObject("ADODB.Connection")

cnnSimple.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strDBPath & ";"
%>

I would be greatful for any help.