I'm working with the ms430-449STK2 olimex development kit that IA
distributes with its software,

"XT2 = 8Mhz"
The problem is that I can't select the XT2 as a clock source for the MCLK
In fact I make this instruction:

FLL_CTL1 = (SELS + SELM1) & (~XT2OFF);

and the IAR IDE show me that the right bits are sets, as follows:
SELM1 = 1
SELM0 = 0
XT20FF= 0
SELS = 1
However the MCLK works like I had selected the DCOPLUS source.

Like an extra comment, something weird is that I can configure the XT2 a
a clock source for SMCLK.