I want to type Ñ inside a circlenode, but it don´t appear in the final result.
At the example, in the 3rd line of code.

Are there any solution?

```
 \begin{pspicture}(-2,-2)(12,6) %\malla
 \rput(-1,-1){$\circlenode{V}{\textcolor{blue}{Vigo}}$}
 \rput(0,2){$\circlenode{C}{\textcolor{yellow}{Coruña}}$}
 \rput(2,0){$\circlenode{S}{\textcolor{red}{Scq}}$}
 \rput(4,2){$\circlenode{P}{\textcolor{green}{Po}}$}

 \ncarc[arcangle=33]{->}{V}{C}
 \naput*{\small $45$}

 \ncarc[arcangle=11]{->}{S}{P}
 \ncput*{\small $25$}

 \ncarc[arcangle=75]{->}{S}{P}
 \ncput*{\small $15$}

 \end{pspicture}

```